KR102634325B1 - 금속 지지형 전기 화학 소자, 고체 산화물형 연료 전지 및 금속 지지형 전기 화학 소자의 제조 방법 - Google Patents
금속 지지형 전기 화학 소자, 고체 산화물형 연료 전지 및 금속 지지형 전기 화학 소자의 제조 방법 Download PDFInfo
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Abstract
Description
[도 2] 금속 지지형 전기 화학 소자의 구성을 나타낸 개략도이다.
[도 3] 금속 지지형 전기 화학 소자의 구성을 나타낸 개략도이다.
[도 4] 금속 지지형 전기 화학 소자의 구성을 나타낸 개략도이다.
[도 5] 금속 지지형 전기 화학 소자의 단면(斷面)의 전자현미경 사진이다.
[도 6] 금속 지지형 전기 화학 소자의 단면의 전자현미경 사진이다.
1a : 관통공
1b : 금속 산화물층(확산 억제층)
2 : 전극층
3 : 완충층
4 : 전해질층
5 : 반응 방지층
6 : 대극 전극층
E : 금속 지지형 전기 화학 소자
Claims (18)
- 지지체로서의 금속 기판;
상기 금속 기판 위에 형성된 전극층;
상기 전극층 위에 형성된 완충층; 및
상기 완충층 위에 형성된 전해질층을, 적어도 가지고,
상기 전극층이 다공질이고, 상기 완충층의 치밀도가, 상기 전극층의 치밀도보다 크고 상기 전해질층의 치밀도보다 작고,
상기 완충층의 치밀도는 상기 전극층의 치밀도에 대하여 120% 이상 135% 이하이고, 상기 전해질층의 치밀도는 상기 완충층의 치밀도에 대하여 102% 이상 108% 이하인, 금속 지지형 전기 화학 소자. - 제1항에 있어서,
상기 완충층의 두께는 상기 전극층의 두께에 대하여 70% 이상 80% 이하인, 금속 지지형 전기 화학 소자. - 제1항에 있어서,
상기 전해질층의 두께는 상기 완충층의 두께에 대하여 57% 이상 63% 이하인, 금속 지지형 전기 화학 소자. - 제1항 내지 제3항 중 어느 한 항에 있어서,
상기 완충층이 세리아계 재료를 포함하는, 금속 지지형 전기 화학 소자. - 제1항 내지 제3항 중 어느 한 항에 있어서,
상기 전해질층이 안정화 지르코니아를 포함하는, 금속 지지형 전기 화학 소자. - 제1항 내지 제3항 중 어느 한 항에 있어서,
상기 완충층의 두께가 4㎛ 이상인, 금속 지지형 전기 화학 소자. - 제1항 내지 제3항 중 어느 한 항에 있어서,
상기 완충층의 두께가 10㎛ 이하인, 금속 지지형 전기 화학 소자. - 제1항 내지 제3항 중 어느 한 항에 있어서,
상기 완충층의 치밀도가 50% 이상 98% 미만인, 금속 지지형 전기 화학 소자. - 제1항 내지 제3항 중 어느 한 항에 있어서,
상기 전해질층의 일부에, 치밀도가 98% 이상인 치밀 전해질층이 포함되어 있는, 금속 지지형 전기 화학 소자. - 제1항 내지 제3항 중 어느 한 항에 있어서,
상기 금속 기판으로부터 상기 전극층으로의 Cr의 확산을 억제하는 확산 억제층을 가지는, 금속 지지형 전기 화학 소자. - 제10항에 있어서,
상기 확산 억제층이, 상기 금속 기판의 표면에 형성된 금속 산화물층인, 금속 지지형 전기 화학 소자. - 제1항 내지 제3항 중 어느 한 항에 있어서,
상기 금속 기판이 복수의 관통공을 가지는, 금속 지지형 전기 화학 소자. - 제12항에 있어서,
상기 관통공은, 상기 금속 기판 중, 상기 금속 기판의 위에 또는 위 쪽에 형성되는 상기 전해질층과 마주 대하는 영역의 내측에 형성되어 있는, 금속 지지형 전기 화학 소자. - 제12항에 있어서,
상기 관통공은 상기 금속 기판에서의 상기 전극층이 형성된 영역의 내측에 형성되어 있는, 금속 지지형 전기 화학 소자. - 제1항 내지 제3항 중 어느 한 항에 있어서,
상기 전해질층 위에 형성된, 상기 전극층의 대극(對極)으로 되는 대극 전극층을 가지는, 금속 지지형 전기 화학 소자. - 제15항에 있어서,
상기 전해질층과 상기 대극 전극층 사이에 형성된 반응 방지층을 가지는, 금속 지지형 전기 화학 소자. - 제1항 내지 제3항 중 어느 한 항에 기재된 금속 지지형 전기 화학 소자를 가지고, 정격 운전 시에 600℃ 이상 750℃ 이하의 온도 영역에서 운전 가능한, 고체 산화물형 연료 전지.
- 제1항 내지 제3항 중 어느 한 항에 기재된 금속 지지형 전기 화학 소자의 제조 방법으로서,
지지체로서의 금속 기판 위에 다공질의 전극층을 형성하는 전극층 형성 단계;
상기 전극층 위에 완충층을 형성하는 완충층 형성 단계; 및
상기 완충층 위에 치밀한 전해질층을 형성하는 전해질층 형성 단계
를 포함하고,
상기 완충층의 치밀도가, 상기 전극층보다 크고, 상기 전해질층의 치밀도보다 작고,
상기 전극층 형성 단계와 상기 완충층 형성 단계와 상기 전해질층 형성 단계가 1100℃ 이하에서 행해지는,
금속 지지형 전기 화학 소자의 제조 방법.
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